my trans is making a ticking noise in first gear on both acceleration and deceleration. The noise speeds up and slows with engine rpm and car speed. Its not the U-joints, the flywheel is fine and the starter is not engaged in the run position. Any ideas on this would be greatly appreciated, as I am hoping that I can avoid a trip to the trans shop and save me a few hundred $$$.

Thanks,
Matt

 

well instead of going to a trans shop, goto a exhaust shop and ask em to tighten down your exhaust manifold because that is where your ticking sound is coming from. it is an exhaust leak. you might be able to do it on the drivers side, but it is tough as hell to do on the passengers side. I know this, cause I am currently driving around like this right now, just ticking around.

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it isn't an exhaust leak, it is a definate mechanical noise coming from the transmission. It also is only in first gear, an exhaust leak would be in all gears. I have heard everything from the governor to low torque convertor fluid levels. I also have heard it may be the parking pin, but I think it would be in all the gears if it is the parking pin. Any information on this would be very useful, as I need to continue driving my car and do not want to fry my trans.

Thanks,
Matt

 

I see noone has helped on this issue (I searched for it) and now I have the same issue. Rest assuerd that it's not flexplate, exhaust leak or anything like that because it only does it in my car when moving in first gear. It started doing it shortly after I put the 355 in. I thought it was the TC cover, but it quits as soon as it shifts into second! It does it in Manual First, or in Auto First. I'm hoping somebody has a quick answer about this! I'm planning to build me a new trans. as the next step on my car anyway, but I just don't have enough of the green currency to do it right now.

Thanks in advance!

BTW, I'm pulling my manuals out right now, and I may even look at a disassembled trans to try to figure it out myself, but I thought that maybe if it was something common.....

 

in both my 89 IROC amd my 89 GMC 1500, the governor weights click when they flop around at slow speeds in first, once I speed up, they are held out by centrifugal (sp?) force and dont make any noise

 

I was thinking along the same lines but I pulled it outand all looks fine. It also sounds more like it's in the front of the trans. I thought it was the converter cover, but it changes with vehicle speed not engine RPM's, and it definately quit's when it shifts into second. I did a quick run through of the GM manual I have here and nothing jumped out at me.

The only thing I see that is applied only in first is the lo roller clutch. Based on this, is it possible that I broke the anti-clunk spring? Maybe I'll do a "Quickie" overhaul and transgo shift kit on it until I can afford to put a better one in it (later case with aux. valve body, etc....)

 

OK, scratch what I had put in that last post.

I looked over the way things work and such, now I'm pretty sure it's the front planetaries.

The only thing I'm not sure of in the power flow through the planetaries is second gear. From what I can figure, I should have the noise in second gear if it is in fact the front planetaries. All the other gear ranges I have figured out as to what the planetary components do. First gear, the forward clutch and forward sprag (or overrun clutch) drive the input sun gear and the inout ring gear is held by the lo roller clutch (or the lo reverse clutch) which causes the input carrier to be turned by the planet gears. Since the input carrier is splined to the output shaft, that is all that's involved.

Third basically locks the input planetaries to obtain a direct drive.

Fourth overruns the input sprag letting the sun gear spin faster. The input comes through the reaction carrier shaft which spins the rear planet carrier. Since the rear sun gear is held, the reaction, or rear ring gear spins faster than the input, providing overdrive.

Now that I have all that, why can't I seem to get what happens in second???? From what I can tell, it goes through both planetary sets, but I just don't understand how!